/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.table.plan.schema

import org.apache.calcite.schema.TemporalTable
import org.apache.flink.table.plan.stats.FlinkStatistic
import org.apache.calcite.schema.impl.AbstractTable

/**
  * Base class for flink table.
  */
abstract class FlinkTable extends AbstractTable with TemporalTable {

  /**
    * Restrict return type of statistic to FlinkStatistic.
    */
  override def getStatistic: FlinkStatistic = ???

  /**
    * Creates a copy of this table, changing statistic.
    *
    * @param statistic A new FlinkStatistic.
    * @return Copy of this table, substituting statistic.
    */
  def copy(statistic: FlinkStatistic): FlinkTable

  /**
    * Currently we do not need this, so we hard code it as default.
    */
  override def getSysStartFieldName: String = "sys_start"

  /**
    * Currently we do not need this, so we hard code it as default.
    */
  override def getSysEndFieldName: String = "sys_end"
}
